增效反应中聚合氯化铝红外结构特征的变化

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摘要：对聚合氯化铝(PAC)进行增效改性是制备高性能无机高分子絮凝剂的重要手段之一。用多核络合剂络合、聚合硅酸交联和聚丙烯酰胺复合三种增效方法改性PAC，分别获得了结构有别于PAC的新型絮凝剂CO-PAC，CR-PAC和PAM-PAC。其傅里叶红外光谱(FTIR)表明，在三种无机高分子结构中均存在Al—OH以外的新化学键，且原有基团的特征吸收峰位置因受结构畸变而发生一定的低频红移，证实了PAC增效反应并不是单纯的物理混合加成作用，而是形成了具有特殊结构的无机高分子的化学反应。这类无机高分子絮凝剂所具有的优良絮凝特性是由增效剂和PAC间以化学作用为主的物理化学因素共同作用的结果。

关键词：絮凝剂;聚合氯化铝(PAC);增效反应;红外光谱;改性剂

Abstract：As an important preparation method of Inorganic Polymer Flocculants (IPFs) with all-round performance, the use of enhanced reactions of modification for Polyaluminum Chlorides (PAC) is a trend of application. In this paper, auctorial-made multicore oligomers as a complexing agent, polysilicate as a crosslinking agent and polyacrylamide as a compounding agent are respectively used to enhance PAC and prepared three kinds of IPFs, named CO-PAC, CR-PAC and PAM-PAC. The Fourier Transform Infrared spectra (FTIR) of the three flocculants show that there have been found new chemical bonds beyond Al—OH in their structures, and each characteristic band of primary group in PAC has a band shift to a lower frequency dure to its structural aberration． These evidences suggested that enhanced reactions of modification for PAC are not at all a simple process of physical mix, but a chemical reaction to form other structural characteristics of inorganic polymers. The excellent coagulation behavior of these new flocculants depends mainly on the chemical actions，but there are a little physical effects between the modifiers and PAC.

Key words：Inorganic polymer flocculants (IPFs);Polyaluminum chloride(PAC);Enhanced reaction of modification;FTIR;Modifier

收稿日期: 2002-10-08 修订日期: 2003-01-08

中图分类号:

O657.33

通讯作者: 周风山

引用本文:

周风山¹，王世虎²，苏金柱³，孙虎³，丁洁¹，徐怡庄¹，吴瑾光¹ . 增效反应中聚合氯化铝红外结构特征的变化 [J]. 光谱学与光谱分析, 2004, 24(05): 532-535.
ZHOU Feng-shan¹，WANG Shi-hu²，SU Jin-zhu³，SUN Hu³，DING Jie¹，XU Yi-zhuang¹，WU Jin-guang¹ . Structural Characteristics of Infrared Spectra for Polyaluminum Chloride in Enhanced Reactions of Modification . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(05): 532-535.

链接本文:

http://www.gpxygpfx.com/CN/Y2004/V24/I05/532

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